CN216014244U - Vehicle host testing device and testing system - Google Patents
Vehicle host testing device and testing system Download PDFInfo
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- CN216014244U CN216014244U CN202121713629.2U CN202121713629U CN216014244U CN 216014244 U CN216014244 U CN 216014244U CN 202121713629 U CN202121713629 U CN 202121713629U CN 216014244 U CN216014244 U CN 216014244U
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Abstract
The utility model discloses a vehicle host machine testing device and a testing system, wherein the vehicle host machine testing device comprises: the decoding unit is connected with the vehicle host and used for receiving display image data sent by the vehicle host, and the display image data comprises at least two frames of image data which are continuous with each other; and the test unit is connected with the decoding unit and used for receiving the display image data sent by the decoding unit, recording a first time point based on the touch signal, comparing two continuous frames of data in the display image data, recording a second time point based on the difference of the two continuous frames of data, and determining the difference value between the second time point and the first time point as the delay time of the touch signal of the vehicle host. The touch signal delay time of the vehicle host can be determined through the test unit, whether the vehicle host works normally at present can be tested, the size of the test equipment is small, the cost is low, and the requirement of long-time automatic test is greatly facilitated.
Description
Technical Field
The utility model relates to the technical field of vehicle testing, in particular to a vehicle host testing device and a vehicle host testing system.
Background
The virtual cockpit technology in the car is more and more extensive now, and navigation entertainment system, back seat entertainment system etc. use more and more extensively, can both show the image and can improve passenger's experience through the touch-sensitive screen operation usually.
However, in the field of automobiles, the requirement for the display device of the rear seat is very high, and the test of hundreds of thousands of hours can be continuously performed in the early stage of mass production, and at the moment, the test of the touch screen by manpower is basically impossible. In order to reduce labor force of manual testing of the touch screen, in the prior art, a manipulator controlled by a program is used for operating the touch screen, and a camera is used for monitoring whether a picture on the screen correctly responds or not.
Disclosure of Invention
Objects of the utility model
The utility model aims to provide a vehicle host testing device and a testing system, which can determine the touch signal delay time of a host by arranging a testing unit, have small volume and low cost, and greatly facilitate the requirement of long-time automatic testing.
(II) technical scheme
To solve the above problem, a first aspect of the present invention provides a vehicle host test apparatus, including: the decoding unit is connected with the vehicle host and is used for receiving display image data sent by the vehicle host, and the display image data comprises at least two continuous frames of image data; the test unit is connected with the decoding unit and used for receiving the display image data sent by the decoding unit, recording a first time point based on a touch signal, comparing two continuous frames of image data in the display image data, recording a second time point of the generated image data of the next frame based on the difference of the two continuous frames of image data, and determining the difference value between the second time point and the first time point as the delay time of the vehicle host machine responding to the touch signal.
Further, the test unit is further configured to compare the display image data with the comparison image data based on that data of two consecutive frames in the display image data are the same, and determine that the vehicle host is abnormal based on that the comparison is inconsistent.
Further, still include: and the storage unit is connected with the test unit and is used for caching the display image data and the comparison image data.
Further, still include: the processor is used for receiving the comparison image data in advance and storing the comparison image data to the test unit; or the processor is used for calling and sending the contrast image data from the network based on the calling instruction sent by the test unit. Alternatively, the network is, for example, the internet or a local area network.
Further, the test unit is further configured to send an interrupt trigger signal to the decoding unit, generate a touch signal based on a command for reading a coordinate of a touch screen, send the touch signal to the decoding unit, and record a time for sending the touch signal as the first time point; the touch signal comprises coordinate data of a simulated touch screen.
Further, the decoding unit is further configured to send the interrupt trigger signal to the vehicle host, receive a command for reading a touch screen coordinate sent by the vehicle host, send the command for reading the touch screen coordinate to the testing unit, and send the touch signal to the vehicle host, so that the vehicle host generates the display image data based on the touch signal.
Furthermore, the vehicle host machine testing device also comprises a second selection connection unit, a coding unit and a touch unit; the second selective connection unit is respectively connected with the decoding unit coding unit and the testing unit; the touch control unit is used for generating a touch control signal based on being touched and sending the touch control signal to the coding unit, and the coding unit is used for sending the touch control signal to the decoding unit and the testing unit through the second selection switch-on unit respectively.
Further, the vehicle host machine testing device further comprises: a first selective switch-on unit connected to the decoding unit, the encoding unit, and the testing unit, respectively; the decoding unit is further configured to send the touch signal to the vehicle host, receive a command for reading a touch screen coordinate sent by the vehicle host, and send the command for reading the touch screen coordinate to the touch unit through the first selection switch-on unit and the encoding unit, where the command for reading the touch screen coordinate is generated by the vehicle host based on the touch signal.
Furthermore, the touch unit is also used for generating accurate coordinate data based on the command for reading the coordinates of the touch screen and sending the accurate coordinate data to the coding unit; the encoding unit is further used for receiving the accurate coordinate data sent by the touch unit, converting the accurate coordinate data into I2C data, and sending the accurate coordinate data in an I2C format to the decoding unit through a first selection switch-on unit; the decoding unit is further used for receiving the accurate coordinate data sent by the encoding unit and sending the accurate coordinate data to a vehicle host machine so that the vehicle host machine can generate the display image data.
A second aspect of the present invention provides a vehicle host test system, including: vehicle host computer and above-mentioned vehicle host computer testing arrangement.
(III) advantageous effects
The technical scheme of the utility model has the following beneficial technical effects:
1. the embodiment of the utility model can record the time point of starting the test and determine the time point of finishing the test by setting the test unit, can determine the touch signal delay time of the vehicle host, and can test whether the vehicle host still works normally at present, and the test equipment has small volume and low cost and greatly facilitates the requirement of long-time automatic test.
2. The embodiment of the utility model can receive the pre-stored contrast image sent by the processor through the testing unit, and simultaneously receive the display image generated by the vehicle host sent by the decoding unit, if the display image sent by the decoding unit is consistent with the contrast image, the received display image can be confirmed to be correct, and the system function of the vehicle host is judged to be normal; compared with the manipulator and manual testing in the prior art, the space, time and cost are greatly saved, quick testing and result judgment can be carried out, and the feasibility and reliability of long-time testing in the research and development process of the vehicle host are greatly improved.
Drawings
Fig. 1 is a schematic structural diagram of a vehicle host test apparatus according to a first embodiment of the present invention.
Reference numerals:
1: a vehicle host; 2: a first LVDS high-speed serial channel; 3: a decoding unit; 4: a first low-speed display data line; 5: an I2C transmission channel; 6: an INT transmission channel; 7: a test unit; 8: a central processing unit; 9: a communication module; 11: a storage unit; 12. second low-speed display data line, 13 a: a second selection turn-on unit; 13 b: a first selection turn-on unit; 14: an encoding unit; 15: a second LVDS high-speed serial channel; 16: a touch unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Fig. 1 is a schematic structural diagram of a vehicle host test apparatus according to a first embodiment of the present invention.
As shown in fig. 1, the vehicle host test apparatus includes: a decoding unit 3 and a testing unit 7. The decoding unit 3 is connected with the vehicle host 1 through the first LVDS high-speed serial channel 2, and the decoding unit 3 is configured to receive display image data generated by the vehicle host 1 based on a touch signal and send the display image data to the test unit 7, where the display image data includes at least two consecutive frames of image data.
The test unit 7 records a first time point T1 based on a touch signal, compares image data of two consecutive frames in the display image data, generates a second time point T2 of the image data of a next frame based on the presence of a difference record of the image data of the two consecutive frames, and determines a difference value T2-T1 between the second time point T2 and the first time point T1 as a delay time of the host vehicle 1 responding to the touch signal. It is understood that the difference between two consecutive frames of image data may be determined whether there is a change in display by comparing the pixel difference ratios of the entire screen, or may be determined whether there is a change in display by comparing the pixel difference ratios of a certain block region.
In some embodiments, the test unit 7 is further configured to compare the display image data with the comparison image data based on that the data of two consecutive frames in the display image data are the same, and determine that the vehicle host 1 is abnormal based on a mismatch of the comparison.
Preferably, the vehicle host test apparatus further includes: and the storage unit 11 is used for caching the display image data. Alternatively, the storage unit 11 may buffer the display image data based on a first-in first-out rule.
The memory unit 11 is, for example, a double data rate synchronous dynamic random access memory (DDR)
In some embodiments, the processor 8 is configured to receive contrast image data in advance and store the precise image to the test unit 7. The processor 8 is for example a microprocessor MCU or a central processing unit CPU. The test unit 7 is, for example, an FPGA chip. The test unit 7 and the processor 8 may be integrated or may use an internal high-speed data line connection, for example an ethernet data line connection.
For example, during the test, the network connected via the communication module 9 transmits the comparison picture to be prepared to the processor 8 in advance, the processor 8 transmits the picture to the test unit 7, and the test unit 7 buffers the picture in the pre-allocated area of the storage unit 11.
In some embodiments, the processor 8 is configured to retrieve the comparison image data from the network based on the retrieval instruction sent by the test unit 7, so as to implement the comparison between the display image data and the comparison image data.
In this embodiment, the network refers to, for example, the internet or a local area network. For example, when processor 8 is a computer device, an ethernet interface may be reserved.
Specifically, the test unit 7 sends a call instruction to the processor 8 according to that the image data of two consecutive frames in the display image data are the same, and the processor 8 calls a network connected to the communication module 9 based on the call instruction, can call the comparison image data from the internet, and sends the comparison image data back to the test unit 7.
Alternatively, the test unit 7 may be a chip including an FPGA.
In some embodiments, the test unit 7 is further configured to send an interrupt trigger signal to the decoding unit 3, generate and send the touch signal to the decoding unit 3 based on the command for reading the touch screen coordinates, and record the time for sending the touch signal as the first time point T1: the decoding unit 3 is further configured to send the interrupt trigger signal to the vehicle host 1, receive a command for reading a touch screen coordinate sent by the vehicle host 1, send the command for reading the touch screen coordinate to the testing unit 7, and send the touch signal to the vehicle host 1, so that the vehicle host 1 generates the display image data based on the touch signal.
The testing steps provided by the above-described embodiments of the present invention will be discussed in detail below with reference to the accompanying drawings. The test provided by the embodiment is mainly used for testing touch simulation through the test device provided by the utility model when the vehicle host is not connected with the display screen.
Firstly, the vehicle host testing device is connected with the vehicle host to be tested, and the processor 8 switches off the second selective switch-on unit 13a and the first selective switch-on unit 13b according to the requirement of automatic testing when the testing equipment is started so as to avoid the influence of real data returned by a screen on the testing. The requirement of automatic testing means that the testing can be automatically completed in an automatic testing manner without accessing the touch unit 16.
The high-speed display image data generated by the vehicle host 1 in real time can be transmitted to the decoding unit 3 through the first LVDS high-speed serial channel 2, and the decoding unit 3 converts the format of the high-speed display image into multi-channel parallel low-speed display image data and transmits the multi-channel parallel low-speed display image data to the testing unit 7 through the first low-speed display data line 4. Wherein the high-speed display image data transmitted by the host vehicle 1 includes at least 2 consecutive frames of image data.
It can be understood that, because LVDS is a low voltage differential signal, the low voltage differential signal includes but is not limited to signals such as FPD-LINK, OPEN LDI, MIPI, HDMI, Display Port, PCIE, etc.; the decoding unit 3 may also convert the high-speed display image into a plurality of low-speed differential signals, and transmit the signals to the testing unit 7 through the first low-speed display data line 4.
In some embodiments, the first low-speed Display data line 4 refers to a video data transmission channel, and may be OPENLDI, HDMI, DVI, Display Port interface, or the like.
The test unit 7 stores each frame of image data included in the display image data into the storage unit 11 according to a first-in first-out principle for buffering, and the test unit 7 can continuously store a plurality of frames according to the size of the memory of the storage unit 11. When the processor 8 runs the test program, a test instruction is sent to the test unit 7, the test unit 7 generates an interrupt trigger signal based on the test instruction, the interrupt trigger signal is transmitted to the decoding unit 3 through the interrupt signal path INT transmission channel 6, and the decoding unit 3 receives the interrupt trigger signal and sends the interrupt trigger signal to the vehicle host 1 through the first LVDS high-speed serial channel 2.
In the above embodiment, the decoding unit 3 is used to deserialize the ultra-high speed serial data transmitted from the host vehicle 1 into multi-path data with a little lower speed, and of course, a small amount of low speed data can be transmitted back to the host vehicle 1 through the high speed serial channel.
After receiving the interrupt trigger signal sent by the decoding unit 3, the vehicle host 1 generates a command for reading the data of the touch screen coordinate according to the interrupt trigger signal, and transmits the command for reading the data of the touch screen coordinate to the decoding unit 3 through the first LVDS high-speed serial channel 2, and after receiving the command for reading the data of the touch screen coordinate, the decoding unit 3 converts the format of the command for reading the data of the touch screen coordinate into I2C data, and sends the command for reading the data of the touch screen coordinate in the I2C format to the testing unit 7 through the I2C transmission channel 5.
The test unit 7 generates and transmits a simulated touch signal based on the command for reading the data of the touch screen coordinates. Wherein the simulated touch signal comprises coordinate data of the simulated touch screen.
For example, the processor 8 sends preset coordinate data to the test unit 7, the test unit 7 converts the preset coordinate data into a data buffer (which may be stored in the test unit 7 or may be held in the storage unit 11) that can be read by the I2C, and the preset coordinate data is coordinate data of the simulated touch screen, which may have many sets.
The test unit 7 transmits the simulated touch signal to the decoding unit 3 through the I2C transmission channel 5, and records the time when the simulated touch signal is transmitted as a first time point T1, wherein the first time point is the touch response time starting point T1.
Then, the decoding unit 3 encodes the coordinate data of the simulated touch screen and transmits the encoded coordinate data to the vehicle host 1 through the first LVDS high-speed serial channel 2, optionally, the decoding unit 3 arranges the coordinate data of the simulated touch screen into one or two paths according to a preset rule and transmits the two paths of the coordinate data to the vehicle host 1, so that the transmission rate can be improved.
The host vehicle 1 will respond accordingly (for example, display another interface or change the content of part of the interface) according to the coordinate data of the simulated touch screen.
Then, the vehicle body 1 transmits the generated high-speed display image data (data of a screen) to the decoding unit 3 through the first LVDS high-speed serial channel 2, and the decoding unit 3 converts the high-speed display image data into multi-channel parallel low-speed image data to transmit to the test unit 7 through the first low-speed display data line 4.
The test unit 7 buffers the received low-speed image data into the storage unit 11, compares the data with the previous frame data buffered into the storage unit 11, when there is a data change, it indicates that a response has been made to the touch event, records the second time T2, and obtains the delay of the response of the host vehicle 1 to the touch event through the subtraction operation T2-T1.
When the touch event is over, the display interface will not change, and at this time, the test unit 7 buffers the received display image data from the vehicle host 1 into the storage unit 11, and compares the display image data with the comparison image data (which refers to the coordinate data corresponding to the pre-stored simulated touch screen) from the processor 8 buffered into other areas of the storage unit 11 in advance, if the data are consistent, it indicates that the vehicle host 1 has made a correct response, and if the data are not consistent, it indicates that the vehicle host 1 has an abnormality, and does not send a correct image.
In some embodiments, the vehicle host machine testing device further includes a second selective connection unit 13a, an encoding unit 14, and a touch unit 16; a touch control unit 16, configured to generate a touch control signal based on being touched, and send the touch control signal to the encoding unit 14; the second selective switch-on unit 13a is connected to the decoding unit 3, the encoding unit 14 and the test unit 7, respectively. And the encoding unit 14 is used for respectively sending the touch signals to the decoding unit 3 and the testing unit 7 through the second selection switch-on unit 13 a.
In some embodiments, the vehicle host machine testing device further includes: a first selective switch-on unit 13b connected to the decoding unit 3, the encoding unit 14, and the test unit 7, respectively; the decoding unit 3 is further configured to send the touch signal to the vehicle host 1, receive a command for reading the touch screen coordinate sent by the vehicle host 1, and send the command for reading the touch screen coordinate to the touch unit 16 via the first selection switch-on unit 13b and the encoding unit 14, where the command for reading the touch screen coordinate is generated by the vehicle host 1 based on the touch signal.
In some embodiments, the first selective switch-on unit 13b is connected to the decoding unit 3 and the test unit 7, respectively, via the I2C transmission channel 5; the second selective switch-on unit 13a is connected to the decoding unit 3 and the test unit 7, respectively, via an INT transmission channel 6.
In some embodiments, the touch unit 16 is further configured to generate accurate coordinate data based on the command for reading the coordinates of the touch screen, and send the accurate coordinate data to the encoding unit 14; the encoding unit 14 is further configured to accept the accurate coordinate data sent by the touch unit 16, convert the accurate coordinate data into I2C data, and send the accurate coordinate data in the I2C format to the decoding unit 3 via the first selection switch-on unit 13 b; the decoding unit 3 is further configured to receive the accurate coordinate data sent by the encoding unit 14, and send the accurate coordinate data to the host vehicle, so that the host vehicle 1 generates the display image data.
The following will explain in detail the vehicle host testing device provided by the above-mentioned embodiment of the present invention, and in this embodiment, the present invention is mainly used for a real testing environment in a case where the vehicle host is connected with the display screen.
Specifically, the vehicle host testing device is connected with the vehicle host 1 to be tested, the vehicle host testing device is connected with the touch unit 16, the processor 8 connects the first selection connection unit 13b and the second selection connection unit 13a according to the testing requirement, the comparison picture can be transmitted to the processor 8 in advance through the network connected by the ethernet interface 9, the processor 8 transmits the comparison picture to the testing unit 7, and the testing unit 7 caches the comparison picture in the pre-allocated area of the storage unit 11. Wherein the comparison image data may be a comparison picture.
The vehicle host 1 transmits high-speed display image data generated in real time to the decoding unit 3 through the first LVDS high-speed serial channel 2, the decoding unit 3 converts the high-speed display image data into multi-channel parallel low-speed display image data, the multi-channel parallel low-speed display image data are transmitted to the testing unit 7 through the first low-speed display data line 4, the testing unit 7 caches each frame of image in the low-speed display image data into the storage unit 11 according to a first-in first-out principle, the low-speed display image data from the first low-speed display data line 4 are copied while the cache is cached, the low-speed display image data are transmitted to the encoding unit 14 through the second low-speed display data line 12, and the encoding unit 14 transmits the low-speed display image data to the touch unit 16 through the second LVDS high-speed serial channel 15 for real-time display after the low-speed display image data are serialized.
In the present embodiment, the touch unit includes a touch display screen.
When a touch test is performed, a user performs a touch operation on the touch unit 16, the touch unit 16 generates a touch signal when an interrupt is generated due to touch, the touch unit 16 transmits the touch signal to the encoding unit 14 through the second LVDS high-speed serial channel 15, the encoding unit 14 generates a level signal based on the touch signal, the second selection switch-on unit 13a switches the encoding unit 14 and the decoding unit 3 on, and the encoding unit 14 transmits the touch signal to the testing unit 7 and the decoding unit 3 through the second selection switch-on unit 13a and the INT transmission channel 6, respectively. The test unit 7 records a first time T1 according to the received touch signal. The decoding unit 3 transmits the touch signal to the vehicle host 1 through the first LVDS high-speed serial channel 2.
The vehicle host 1 generates a command for reading touch screen coordinate data according to the received touch signal, and transmits the command for reading the touch screen coordinate data to the decoding unit 3 through the first LVDS high-speed serial channel 2, the decoding unit 3 converts the command for reading the touch screen coordinate data into a command for reading the touch screen coordinate data in the format of I2C, then the decoding unit 3 transmits the command for reading the touch screen coordinate data in the format of I2C to the encoding unit 14 through the I2C transmission channel 5 and the first selection connection unit 13b, and the encoding unit 14 transmits the command for reading the touch screen coordinate data in the format of I2C to the touch unit 16 through the second LVDS high-speed serial channel 15 after being serialized.
The touch unit 16 receives the serialized command of the coordinate data of the touch screen in the I2C format, responds to the command, generates accurate coordinate data, transmits the accurate coordinate data to the encoding unit 14 through the second LVDS high-speed serial channel 15, the encoding unit 14 converts the accurate coordinate data into I2C data, and transmits the accurate coordinate data in the I2C format back to the decoding unit 3 through the first selective switch-on unit 13b and the I2C transmission channel 5.
The decoding unit 3 transmits the accurate coordinate data in the I2C format to the vehicle host 1 via the first LVDS high-speed serial channel 2.
The host vehicle 1 makes a corresponding response according to the accurate coordinate data, since the operation of the touch screen is usually accompanied by the change of the screen, that is, the host vehicle 1 transmits the corresponding display image data to the decoding unit 3 through the first LVDS high-speed serial channel 2 according to the accurate coordinate data, the decoding unit 3 converts the corresponding display image data into multi-channel parallel low-speed display image data, and then the decoding unit 3 transmits the low-speed display image data to the testing unit 7 through the first low-speed display data line 4.
The test unit 7 buffers the received low-speed display image data into the storage unit 11, and compares the low-speed display image data with previous frame data buffered into the storage unit 11, when there is data change, it indicates that a response has been made to the touch event, at this time, time T2 is recorded, the delay of the response of the vehicle host 1 to the touch event can be obtained through subtraction T2-T1, when the touch event is over, the display interface does not change, at this time, the test unit 7 buffers the received display data from the vehicle host 1 into the storage unit 11, and compares the display data with the pre-buffered comparison image data from the processor 8, if the data are consistent, it indicates that the vehicle host 1 makes a correct response, and if the data are not consistent, it indicates that the vehicle host 1 has an abnormality, and no correct image is sent.
According to the vehicle host testing device provided by the embodiment of the utility model, the vehicle host testing device is arranged between the vehicle host 1 and the touch unit 16, can test the vehicle host with screen display and touch functions at the same time, and can be selectively connected to a screen and a touch screen of an automobile or disconnected from the automobile at the other end according to different testing requirements.
When a touch response test is required without contacting the control unit 16, the data of the FPGA chip of the test unit 7 in the device simulating the touch screen is output to the vehicle host, the image which can be changed after the response of the vehicle host is output to the device, the FPGA chip arranged in the device analyzes the image, on one hand, the response time of the touch screen can be obtained, on the other hand, if the response time is compared with the pre-stored contrast image, whether the correct response is carried out can be accurately analyzed, and as the processor is arranged in the device, the data of the FPGA chip simulating the touch screen and the pre-stored contrast image can be changed at any time in the test process, so that the complex touch operation and the analysis of the image can be conveniently carried out. When a touch is stuck or cannot respond correctly, the response time of the obtained touch screen is delayed greatly, and the problem can be solved by analyzing when the vehicle host does not respond correctly. If the touch operation is finished and the displayed picture is inconsistent with the pre-stored contrast picture, the vehicle host can be judged to have an error, and the problem needs to be analyzed and solved.
When the touch unit 16 is accessed to perform a touch response test, the FPGA chip in the device monitors information returned by the touch screen data to the vehicle host, when the generation of the data of a touch event is detected, whether the image input by the vehicle host is correct or not is analyzed, then the response time of the touch screen can be obtained according to the generation of the touch screen data and the change of the image of the vehicle host, and meanwhile, whether the vehicle host makes correct response or not can be detected by comparing the touch screen data with the prestored comparison image.
Because an FPGA chip can be used as a test unit, the test unit 7 can receive a pre-stored contrast image sent by the processor 8, and simultaneously receive a display image generated by the vehicle host sent by the decoding unit 3, if the display image sent by the decoding unit 3 is consistent with the contrast image, the received display image can be confirmed to be correct, and the system function of the vehicle host is judged to be normal. Compared with the manipulator and manual testing in the prior art, the space, time and cost are greatly saved, quick testing and result judgment can be carried out, and the feasibility and reliability of long-time testing in the research and development process of the vehicle host are greatly improved.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. A vehicle host machine testing device, comprising:
the decoding unit (3) is connected with the vehicle host machine, and the decoding unit (3) is used for receiving display image data sent by the vehicle host machine, wherein the display image data comprises at least two continuous frames of image data;
the testing unit (7) is connected with the decoding unit (3), and the testing unit (7) is used for receiving the display image data sent by the decoding unit (3), recording a first time point based on a touch signal, comparing two continuous frames of image data in the display image data, recording a second time point of the generated next frame of image data based on the difference of the two continuous frames of image data, and determining that the difference between the second time point and the first time point is the delay time of the vehicle host computer responding to the touch signal.
2. The vehicle host test apparatus according to claim 1,
the test unit (7) is further configured to compare the display image data with comparison image data based on the fact that data of two consecutive frames in the display image data are the same, and determine that the vehicle host is abnormal based on the fact that the comparison is inconsistent.
3. The vehicle host machine test device according to claim 2, further comprising:
the storage unit (11) is connected with the test unit (7), and the storage unit (11) is used for caching the display image data and the comparison image data.
4. The vehicle host machine test device according to claim 3, further comprising:
a processor (8) for receiving the comparison image data in advance and storing the comparison image data to the test unit (7); or
And the processor (8) is used for calling and sending the comparison image data from the network based on the calling instruction sent by the test unit (7).
5. The vehicle host machine test apparatus according to any one of claims 1 to 4,
the test unit (7) is further configured to send an interrupt trigger signal to the decoding unit (3), generate a touch signal based on a command for reading a coordinate of a touch screen, send the touch signal to the decoding unit (3), and record a time for sending the touch signal as the first time point; wherein the content of the first and second substances,
the touch signal includes coordinate data of the simulated touch screen.
6. The vehicle host test apparatus according to claim 5,
the decoding unit (3) is further configured to send the interrupt trigger signal to the vehicle host, receive a command for reading a touch screen coordinate sent by the vehicle host, send the command for reading the touch screen coordinate to the testing unit (7), send the touch signal to the vehicle host, and enable the vehicle host to generate the display image data based on the touch signal.
7. The vehicle host machine testing device according to any one of claims 1-4, further comprising a second selection switch-on unit (13a), a coding unit (14), and a touch control unit (16);
the second selective switch-on unit (13a) is connected to the decoding unit (3), the encoding unit (14) and the test unit (7), respectively;
the touch control unit (16) is used for generating a touch control signal based on being touched and sending the touch control signal to the coding unit (14), and the coding unit (14) is used for sending the touch control signal to the decoding unit (3) and the testing unit (7) through the second selection switch-on unit (13 a).
8. The vehicle host machine test device according to claim 7, further comprising:
a first selective switch-on unit (13b) which is connected to the decoding unit (3), the encoding unit (14) and the test unit (7), respectively;
the decoding unit (3) is further configured to send the touch signal to the vehicle host, receive a command for reading touch screen coordinates sent by the vehicle host, and send the command for reading touch screen coordinates to the touch unit (16) through the first selection switch-on unit (13b) and the encoding unit (14), where the command for reading touch screen coordinates is generated by the vehicle host based on the touch signal.
9. The vehicle host test apparatus according to claim 8,
the touch control unit (16) is also used for generating accurate coordinate data based on the command for reading the coordinates of the touch screen and sending the accurate coordinate data to the coding unit (14);
the encoding unit (14) is further used for receiving the accurate coordinate data sent by the touch unit (16), converting the accurate coordinate data into I2C data and sending the accurate coordinate data in an I2C format to the decoding unit (3) through a first selection switch-on unit (13 b);
the decoding unit (3) is also used for receiving the accurate coordinate data sent by the encoding unit (14) and sending the accurate coordinate data to a vehicle host machine so as to enable the vehicle host machine to generate the display image data.
10. A vehicle host test system, comprising: a vehicle host machine and a vehicle host machine testing device according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121713629.2U CN216014244U (en) | 2021-07-26 | 2021-07-26 | Vehicle host testing device and testing system |
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